CN216008845U

CN216008845U - Novel oil pump with overflow structure

Info

Publication number: CN216008845U
Application number: CN202121773138.7U
Authority: CN
Inventors: 史祥龙
Original assignee: Nanjing Chuangxin Oil Pump Manufacturing Co ltd
Current assignee: Nanjing Chuangxin Oil Pump Manufacturing Co ltd
Priority date: 2021-07-30
Filing date: 2021-07-30
Publication date: 2022-03-11
Anticipated expiration: 2031-07-30

Abstract

The utility model discloses an oil pump with a novel overflow structure, which comprises a pump body and a pump cover matched with the pump body, wherein an oil outlet and an overflow hole communicated with the oil outlet are formed in the pump cover, a steel ball and a spring are arranged in the overflow hole, the steel ball is supported at the bottom of the overflow hole by the spring, a pin hole penetrating through the overflow hole is formed in the pump cover, a positioning pin is arranged in the pin hole, and the positioning pin penetrates through the center line of the overflow hole and is perpendicular to the center line of the overflow hole. The spring is tightly pressed by the positioning pin, the positioning pin is arranged in the positioning pin, and the positioning pin bears the pressure of the spring, so that the positioning pin is more stable than the retainer ring in the overflow hole in threaded connection, and the reliability of the overflow structure of the oil pump is improved.

Description

Novel oil pump with overflow structure

Technical Field

The utility model relates to the technical field of oil pumps, in particular to an oil pump with a novel overflow structure.

Background

The oil pump is a device for supplying high-pressure oil, is used for supplying oil to the device, and is widely applied to engines. At present, in order to improve the safety of the oil pump, a built-in overflow valve is usually arranged at the high-pressure end of the oil pump and used for overflowing when the oil pressure is too high, so as to control the oil pressure at the high-pressure end of the oil pump and avoid the damage of the oil pump caused by the too high oil pressure.

At present, an overflow valve in an existing oil pump is usually realized through a steel ball and a spring which are arranged in an overflow hole, the spring has certain initial pressure, when the pressure at an oil outlet end of the oil pump has a certain numerical value, the steel ball is pressed to move, the overflow hole is conducted to release the pressure, the spring is fixed in the overflow hole through a nut or a retainer ring, when the oil pump is assembled, the steel ball and the spring need to be sequentially placed into the overflow hole and tightly pressed by the retainer ring, the tightly pressing degree of the retainer ring needs to be strictly controlled, so that the overflow pressure of the oil pump meets the requirement, and the assembling process requirement is high. Secondly, a check ring of the compression spring bears the pressure of the spring on one hand and also needs to bear the oil pressure at the oil outlet end of the oil pump on the other hand, and when the working environment of the oil pump is poor (frequent vibration and the like), threads of the check ring are easy to loosen, so that the overflow pressure of the oil pump is reduced.

SUMMERY OF THE UTILITY MODEL

The utility model provides an oil pump with a novel overflow structure, which has the advantages that the novel overflow structure is adopted, the structure that a spring is compressed through a nut or a retainer ring in the traditional oil pump is abandoned, and the reliability of the overflow structure of the oil pump of a hoister is improved.

The utility model aims to realize the purpose through the following technical scheme that the oil pump with the novel overflow structure comprises a pump body and a pump cover matched with the pump body, wherein an oil outlet and an overflow hole communicated with the oil outlet are formed in the pump cover, a steel ball and a spring are arranged in the overflow hole, the spring enables the steel ball to abut against the bottom of the overflow hole, a pin hole penetrating through the overflow hole is formed in the pump cover, and a positioning pin is arranged in the pin hole and penetrates through the center line of the overflow hole and is perpendicular to the center line of the overflow hole.

Through above-mentioned technical scheme, the spring compresses tightly through the locating pin, and need not to connect through the retaining ring of threaded connection in the overflow hole, and the locating pin is installed in the locating pin, and the locating pin bears the pressure of spring, compares in the retaining ring of threaded connection in the overflow hole, and the position of locating pin is more firm, has improved the reliability of oil pump overflow structure.

The utility model is further arranged in that a circular positioning sleeve is arranged between the spring and the positioning pin, one end of the spring is abutted against one end face of the positioning sleeve, and the other end face of the positioning sleeve is contacted with the positioning pin.

Through above-mentioned technical scheme, through setting up the position sleeve, the position sleeve is bigger with the terminal surface area of contact of spring, is favorable to keeping the steady compression of spring, improves the reliability of spring.

The utility model is further provided that the outer circle surface of the positioning sleeve is attached to the inner wall of the overflow hole, and the length of the positioning sleeve in the axial direction is not less than one fourth of the outer diameter of the positioning sleeve.

Through above-mentioned technical scheme, the position is firm difficult for rotating in the overflow hole to the position cover, and the compression spring that the position cover can be fine.

The utility model is further arranged in such a way that two grooves matched with the positioning pins are arranged on the end surface of the positioning sleeve close to the positioning pins, and the positioning pins are positioned in the grooves.

Through above-mentioned technical scheme, the locating pin is arranged in the recess and increases the area of contact between locating pin and the position sleeve, has further improved the reliability of position sleeve.

In conclusion, the beneficial effects of the utility model are as follows:

1. the positioning pin is used for pressing the spring and bearing the pressure of the spring, so that the reliability of the overflow structure of the oil pump is improved;

2. the positioning sleeve is arranged to be in good contact with the spring, so that the spring can be stably compressed by the positioning pin;

3. compared with the traditional overflow structure that the spring is compressed by the retainer ring which is in threaded connection with the overflow hole, the structure in the utility model is more reliable, and the reduction of the overflow pressure of the oil pump is not easy to cause.

Drawings

FIG. 1 is a schematic structural diagram of a first embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a second embodiment of the present invention;

fig. 3 is a schematic structural diagram of a positioning sleeve in the second embodiment of the utility model.

In the figure, 1, a pump body; 2. a pump cover; 3. an oil outlet; 4. an overflow aperture; 5. a steel ball; 6. a spring; 7. positioning pins; 8. a positioning sleeve; 9. and (4) a groove.

Detailed Description

The following detailed description of embodiments of the utility model refers to the accompanying drawings.

The first embodiment is as follows: referring to fig. 1, an oil pump with a novel overflow structure comprises a pump body 1 and a pump cover 2 matched with the pump body 1, wherein an oil outlet 3 and an overflow hole 4 communicated with the oil outlet 3 are formed in the pump cover 2, a steel ball 5 and a spring 6 are arranged in the overflow hole 4, the steel ball 5 is supported to the bottom of the overflow hole 4 by the spring 6, a pin hole penetrating through the overflow hole 4 is formed in the pump cover 2, a positioning pin 7 is arranged in the pin hole, and the positioning pin 7 penetrates through the center line of the overflow hole 4 and is perpendicular to the center line of the overflow hole 4. The spring 6 compresses tightly through locating pin 7, and need not to connect through the retaining ring of threaded connection in overflow hole 4, and locating pin 7 is installed in locating pin 7, and locating pin 7 bears spring 6's pressure, compares in the retaining ring of threaded connection in overflow hole 4, and the position of locating pin 7 is more firm, has improved the reliability of oil pump overflow structure.

Example two: referring to fig. 2-3, a difference of the oil pump with the novel overflow structure from the first embodiment is that an annular positioning sleeve 8 is disposed between the spring 6 and the positioning pin 7, one end of the spring 6 abuts against one end face of the positioning sleeve 8, and the other end face of the positioning sleeve 8 contacts with the positioning pin 7. Through setting up position sleeve 8, position sleeve 8 is bigger with the terminal surface area of contact of spring 6, is favorable to keeping the steady compression of spring 6, improves the reliability of spring 6.

The outer disc of position sleeve 8 with the laminating of the inner wall of overflow hole 4 just length on the 8 axis directions of position sleeve is not less than the quarter of 8 external diameters of position sleeve, and position sleeve 8 is firm difficult for rotating in overflow hole 4, and compression spring 6 that position sleeve 8 can be fine. Two grooves 9 matched with the positioning pins 7 are formed in the end face, close to the positioning pins 7, of the positioning sleeve 8, the positioning pins 7 are located in the grooves 9, the contact area between the positioning pins 7 and the positioning sleeve 8 is increased when the positioning pins 7 are located in the grooves 9, and the reliability of the positioning sleeve 8 is further improved.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various changes and modifications can be made without departing from the inventive concept of the present invention, and these changes and modifications are all within the scope of the present invention.

Claims

1. The utility model provides an oil pump of novel overflow structure, includes pump body (1) and pump cover (2) that matches with the pump body (1), is equipped with oil-out (3) on pump cover (2) and overflow hole (4) with oil-out (3) intercommunication, its characterized in that be equipped with steel ball (5) and spring (6) in overflow hole (4), spring (6) support steel ball (5) in the bottom of overflow hole (4), are equipped with the pinhole that runs through overflow hole (4) on pump cover (2), are equipped with locating pin (7) in the pinhole, and locating pin (7) pass the central line of overflow hole (4) and are perpendicular with the central line of overflow hole (4).

2. The oil pump with the novel overflow structure is characterized in that an annular positioning sleeve (8) is arranged between the spring (6) and the positioning pin (7), one end of the spring (6) abuts against one end face of the positioning sleeve (8), and the other end face of the positioning sleeve (8) is in contact with the positioning pin (7).

3. The oil pump with the novel overflow structure is characterized in that the outer circular surface of the positioning sleeve (8) is attached to the inner wall of the overflow hole (4), and the length of the positioning sleeve (8) in the axial direction is not less than one fourth of the outer diameter of the positioning sleeve (8).

4. The oil pump with the novel overflow structure is characterized in that two grooves (9) matched with the positioning pins (7) are formed in the end face, close to the positioning pins (7), of the positioning sleeve (8), and the positioning pins (7) are located in the grooves (9).